Carolyn, ref your William Munro who married Margaret Reid, daughter of James Reid and Margaret Mackenzie of Rogart - it is quite possible that your Margaret Reid is related to the Reid in Nora's message. Reid is not a local name in Sutherland and there are very few families of that name especially in Rogart. Your James Reid and Margaret Mackenzie had 12 children, one of whom was named Janet. Worth checking. If you need the names of James and Margaret's children please send me an email.
Best wishes
Christine